I Think They Got it Backwards

This story is about genetically altered mice, by removing receptors that allow them to smell their ultimate predator, cats, they do not fear them. Set aside for the moment how making a fearless mouse helps the world or cats, look at the video. Seems to me they found a cat who does not care about mice! Also, didn’t I see something the other week about mice being made stronger? This scares me, mice that are not afraid of kitty and then can beat it up?